CN112362685A

CN112362685A - Rock high-temperature cycle experimental device

Info

Publication number: CN112362685A
Application number: CN202011385612.9A
Authority: CN
Inventors: 张蓉蓉; 马冬冬; 黄坤; 施宇航; 袁璞
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-02-12
Anticipated expiration: 2040-12-01
Also published as: ZA202105612B; CN112362685B

Abstract

The invention relates to a rock high-temperature circulation experimental device which comprises a water inlet tank, a water pump, a water inlet valve, a water storage tank, a water discharge valve, a water discharge tank, a temperature sensor, a temperature monitoring system, a heating source, a heating control system, a ventilating ring partition plate, a heat insulating bottom plate, a heat insulating top plate, a pressure control vent hole, a heat transfer plate, a rock sample, a constant-pressure ventilating cover and a ventilating hole.

Description

Rock high-temperature cycle experimental device

Technical Field

The invention relates to a rock high-temperature circulation experimental device.

Background

Rock mass in a large number of projects is in a changing temperature environment, the rock can experience high temperature due to external causes such as blasting, drilling, storage of nuclear waste and the like, and then the rock can gradually return to a normal temperature state after external factors are eliminated, so that the high temperature circulation problem of the rock is widely concerned. In addition, in the high-temperature heating process of the rock, the temperature rise process of the rock is not in a constant temperature field, and a temperature gradient often exists, and a large number of researches show that the influence of the temperature gradient on the physical and mechanical properties of the rock is obvious, so that the influence of the temperature gradient needs to be considered when an indoor rock high-temperature circulation experiment is carried out. In chinese patent granted book, CN110030831B discloses a mechanical property test high temperature furnace with temperature gradient function, which comprises a high temperature heating furnace, a heat insulator and an annular sealing ring, wherein the device is provided with the heat insulator, so that the purpose of testing the mechanical property of the high temperature structural material under the condition of temperature gradient field can be realized.

Although the device can consider the influence of the temperature gradient in the high-temperature heating process of the rock, the device has the defects of complex structure, difficulty in controlling the precision of the temperature gradient and the like, and therefore the rock high-temperature circulation experimental device which is more convenient to design and accurately controlled by the temperature gradient is needed.

Disclosure of Invention

The invention aims to provide a rock high-temperature circulation experimental device, by which the influence of temperature gradient can be considered in the rock heating process. The invention has the characteristics of simple structure, convenient operation and the like.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the utility model provides a rock high temperature cycle experimental apparatus comprises inlet channel, water pump, inlet valve, storage water tank, drain valve, drain tank, temperature sensor, temperature monitoring system, heating source, heating control system, ventilative ring baffle, adiabatic bottom plate, adiabatic roof, accuse pressure gas release, heat transfer plate, rock sample, level pressure ventilative lid, bleeder vent.

The rock sample is annularly provided with a heat transfer plate, the bottoms of the rock sample and the heat transfer plate are contacted with a heat insulation bottom plate, the tops of the rock sample and the heat transfer plate are contacted with a heat insulation top plate, and a pressure control air release hole is formed in the heat insulation top plate; a heating source is arranged around the heat insulation bottom plate and connected with a heating control system; the heat transfer plate is annularly provided with a ventilating ring partition plate and a water storage tank, and the experimental device is divided into a plurality of layers of spaces by the ventilating ring partition plate and the water storage tank; temperature sensors are arranged in the spaces of different layers and connected with a temperature monitoring system; a water inlet groove, a water pump, a water inlet valve, a water drainage valve and a water drainage groove are arranged around the water storage tank; the upper cover of the water storage tank is provided with a constant pressure ventilation cover.

In the device, the ventilating ring partition plate and the water storage tank are both made of high-temperature resistant materials.

In the above device, the heat transfer plate has a truncated cone shape.

In the above device, the constant pressure ventilation cover is pushed open when the pressure applied thereto reaches a predetermined pressure.

Compared with the prior art, the invention has the beneficial effects that:

by arranging the water storage tank, the heating source, the heating control system, the breathable ring partition plate, the heat insulation bottom plate and the heat insulation top plate in the arrangement mode, the temperature in the tank body at the lower part of the water storage tank can be controlled by the heating source, and the temperature in the tank body at the upper part of the water storage tank is controlled by the steam in the water storage tank; the purpose of controlling the temperature of different layers in the test device can be realized by arranging the ventilating ring partition plate, the heat transfer plate and the pressure-control air release holes and controlling the density of the ventilating holes, the size of the heat transfer plate and the discharge time of the pressure-control air release holes, so that a temperature gradient is formed inside the rock sample in the heating process; the temperature in different layers can be monitored in real time through the temperature sensor and the temperature monitoring system so as to be adjusted.

Drawings

FIG. 1 is a schematic structural diagram of a rock high-temperature cycle experimental device of the invention.

FIG. 2 is a schematic diagram of the connection of parts of components of the rock high-temperature cycle experimental device.

The reference numbers in the figures illustrate: 1-water inlet tank, 2-water pump, 3-water inlet valve, 4-water storage tank, 5-water discharge valve, 6-water discharge tank, 7-temperature sensor, 8-temperature monitoring system, 9-heating source, 10-heating control system, 11-air-permeable ring partition plate, 12-heat-insulating bottom plate, 13-heat-insulating top plate, 14-pressure-control air discharge hole, 15-heat transfer plate, 16-rock sample, 17-constant-pressure air-permeable cover and 18-air vent.

Detailed Description

The invention will be described in further detail with reference to the following drawings and specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

fig. 1 and 2 show a high-temperature cycle experimental device for rocks, which is composed of a water inlet tank 1, a water pump 2, a water inlet valve 3, a water storage tank 4, a water discharge valve 5, a water discharge tank 6, a temperature sensor 7, a temperature monitoring system 8, a heating source 9, a heating control system 10, a breathable ring partition plate 11, a heat insulation bottom plate 12, a heat insulation top plate 13, a pressure control vent hole 14, a heat transfer plate 15, a rock sample 16, a constant pressure vent cover 17 and a vent hole 18. Wherein, the heat transfer plate 15 is arranged on the rock sample 16 in the ring direction, the bottom of the rock sample 16 and the heat transfer plate 15 is contacted with the heat insulation bottom plate 12, the top of the rock sample 16 and the heat transfer plate 15 is contacted with the heat insulation top plate 13, and the pressure control air release hole 14 is arranged in the heat insulation top plate 13; a heating source 9 is arranged around the heat insulation bottom plate 12, and the heating source 9 is connected with a heating control system 10; the heat transfer plate 15 is annularly provided with a ventilating ring partition plate 11 and a water storage tank 4, and the experimental device is divided into a plurality of layers of spaces by the ventilating ring partition plate 11 and the water storage tank 4; temperature sensors 7 are arranged in the spaces of different layers, and the temperature sensors 7 are connected with a temperature monitoring system 8; a water inlet tank 1, a water pump 2, a water inlet valve 3, a drainage valve 5 and a drainage tank 6 are arranged around the water storage tank 4; the upper cover of the water storage tank 4 is provided with a constant pressure ventilation cover 17. The ventilating ring partition plate 11 and the water storage tank 4 are both made of high-temperature resistant materials; the heat transfer plate 15 is in a circular truncated cone shape; the constant pressure ventilation cover 17 is pushed open when the pressure applied reaches the set pressure.

The high-temperature cycle experiment of the rock comprises the following steps:

firstly, placing a rock sample 16 and a heat transfer plate 15 in an experimental device, installing a water storage tank 4 and a breathable ring partition plate 11 containing breathable holes 18 with different sizes around the heat transfer plate 15, installing the water storage tank 4 and the breathable ring partition plate 11 according to experimental design in number and position, dividing the whole device into 4 layers by the water storage tank 4 and the breathable ring partition plate 11 in figures 1 and 2, respectively marking the layers as a first layer, a second layer, a third layer and a fourth layer from top to bottom for convenience of description, arranging temperature sensors 7 in each layer, and connecting all the temperature sensors 7 to a temperature monitoring system 8;

secondly, covering a heat insulation top plate 13, closing a pressure control vent hole 14 and a drainage valve 5, adding distilled water into a water inlet tank 1, opening a water pump 2 and a water inlet valve 3 to ensure that a certain amount of distilled water is stored in a water storage tank 4, and then closing the water inlet valve 3;

thirdly, a heating control system 10 is opened, the temperature is raised through a heating source 9, the temperature of the fourth layer rises most quickly, the third layer is arranged, when the heat is transferred to the water storage tank 4, the distilled water in the water storage tank 4 starts to rise after absorbing the heat, when the temperature reaches the boiling point of the water, the distilled water is changed into water vapor, when the pressure in the water storage tank 4 reaches the set value of a constant-pressure ventilating cover 17, the constant-pressure ventilating cover 17 is pushed open, the water vapor enters the second layer, then the water vapor enters the first layer through a ventilating ring partition plate 11, the pressure in the first layer and the pressure in the second layer can be controlled through controlling a pressure-controlling ventilating hole 14, and the purpose of controlling the temperature in the first layer and the temperature in the second layer can be achieved, for example, if the pressure-controlling ventilating hole 14 is opened, the temperature of the first layer and the second layer will be reduced, if the pressure-controlling ventilating hole 14 is closed, the temperature of the first layer and the second layer will rise, namely, the temperature of the first layer and the second layer is controlled The density of the upper air holes 18 is regulated, the temperature of the third layer and the fourth layer is regulated by the heating control system 10 and the density of the upper air holes 18 on the air-permeable circular partition plate 11 positioned between the third layer and the fourth layer, so that the rock sample 16 is in a temperature gradient environment in the heating process, and during the period, if the distilled water in the water storage tank 4 is insufficient, the water pump 2 and the water inlet valve 3 can be opened for supplement;

fourthly, after the heating time reaches the set time, opening the pressure control air release hole 14 and the drainage valve 5, and setting the temperature of the heating control system 10 at the normal temperature;

and step five, finishing one high-temperature cycle after the required normal-temperature duration is reached, and then repeating the step two to the step four until all high-temperature cycles are finished.

Claims

1. The utility model provides a rock high temperature cycle experimental apparatus, by intake chamber (1), water pump (2), inlet valve (3), storage water tank (4), drain valve (5), water drainage tank (6), temperature sensor (7), temperature monitoring system (8), heating source (9), heating control system (10), ventilative ring baffle (11), adiabatic bottom plate (12), adiabatic roof (13), accuse pressure relief hole (14), heat transfer plate (15), rock sample (16), level pressure ventilative lid (17), bleeder vent (18) are constituteed, its characterized in that: the heat transfer plate (15) is arranged on the rock sample (16) in the circumferential direction, the bottoms of the rock sample (16) and the heat transfer plate (15) are in contact with the heat insulation bottom plate (12), the tops of the rock sample (16) and the heat transfer plate (15) are in contact with the heat insulation top plate (13), and the pressure control vent hole (14) is arranged in the heat insulation top plate (13); a heating source (9) is arranged around the heat insulation bottom plate (12), and the heating source (9) is connected with a heating control system (10); the heat transfer plate (15) is annularly provided with a ventilating ring partition plate (11) and a water storage tank (4), and the experimental device is divided into a plurality of layers of spaces by the ventilating ring partition plate (11) and the water storage tank (4); temperature sensors (7) are arranged in the spaces of different layers, and the temperature sensors (7) are connected with a temperature monitoring system (8); a water inlet groove (1), a water pump (2), a water inlet valve (3), a drainage valve (5) and a drainage groove (6) are arranged around the water storage tank (4); the upper cover of the water storage tank (4) is provided with a constant pressure ventilation cover (17).

2. The high-temperature rock circulation experimental device according to claim 1, characterized in that: the ventilating ring partition plate (11) and the water storage tank (4) are both made of high-temperature-resistant materials.